Apple Final Cut Pro 7 - Manual (Page 1697)

For more information on configuring the audio outputs of sequences, see “Assigning
Output Channels and External Audio Monitors.”
4 Assign each audio track in your sequence to the proper output channel.
5 Choose a device control preset that contains an audio mapping with the same number
of audio channels as the video or audio deck you are going to output to.
1697 Chapter 101 Assemble and Insert Editing Using Edit to Tape